Cleanup the mess in cpu_cache_init.

    
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

6 files changed, 62 insertions, 61 deletions

diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c
index 5d71eca..8e6427a 100644
--- a/arch/mips/kernel/cpu-probe.c
+++ b/arch/mips/kernel/cpu-probe.c
@@ -191,7 +191,7 @@ static inline int __cpu_has_fpu(void)
 	return ((cpu_get_fpu_id() & 0xff00) != FPIR_IMP_NONE);
 }
 
-#define R4K_OPTS (MIPS_CPU_TLB | MIPS_CPU_4KEX | MIPS_CPU_4KTLB \
+#define R4K_OPTS (MIPS_CPU_TLB | MIPS_CPU_4KEX | MIPS_CPU_4K_CACHE \
 		| MIPS_CPU_COUNTER)
 
 static inline void cpu_probe_legacy(struct cpuinfo_mips *c)
@@ -200,7 +200,8 @@ static inline void cpu_probe_legacy(struct cpuinfo_mips *c)
 	case PRID_IMP_R2000:
 		c->cputype = CPU_R2000;
 		c->isa_level = MIPS_CPU_ISA_I;
-		c->options = MIPS_CPU_TLB | MIPS_CPU_NOFPUEX;
+		c->options = MIPS_CPU_TLB | MIPS_CPU_3K_CACHE |
+		             MIPS_CPU_NOFPUEX;
 		if (__cpu_has_fpu())
 			c->options |= MIPS_CPU_FPU;
 		c->tlbsize = 64;
@@ -214,7 +215,8 @@ static inline void cpu_probe_legacy(struct cpuinfo_mips *c)
 		else
 			c->cputype = CPU_R3000;
 		c->isa_level = MIPS_CPU_ISA_I;
-		c->options = MIPS_CPU_TLB | MIPS_CPU_NOFPUEX;
+		c->options = MIPS_CPU_TLB | MIPS_CPU_3K_CACHE |
+		             MIPS_CPU_NOFPUEX;
 		if (__cpu_has_fpu())
 			c->options |= MIPS_CPU_FPU;
 		c->tlbsize = 64;
@@ -297,7 +299,7 @@ static inline void cpu_probe_legacy(struct cpuinfo_mips *c)
 	#endif
 	case PRID_IMP_TX39:
 		c->isa_level = MIPS_CPU_ISA_I;
-		c->options = MIPS_CPU_TLB;
+		c->options = MIPS_CPU_TLB | MIPS_CPU_TX39_CACHE;
 
 		if ((c->processor_id & 0xf0) == (PRID_REV_TX3927 & 0xf0)) {
 			c->cputype = CPU_TX3927;
@@ -441,7 +443,7 @@ static inline unsigned int decode_config0(struct cpuinfo_mips *c)
 	config0 = read_c0_config();
 
 	if (((config0 & MIPS_CONF_MT) >> 7) == 1)
-		c->options |= MIPS_CPU_TLB | MIPS_CPU_4KTLB;
+		c->options |= MIPS_CPU_TLB;
 	isa = (config0 & MIPS_CONF_AT) >> 13;
 	switch (isa) {
 	case 0:
@@ -516,8 +518,8 @@ static inline unsigned int decode_config3(struct cpuinfo_mips *c)
 static inline void decode_configs(struct cpuinfo_mips *c)
 {
 	/* MIPS32 or MIPS64 compliant CPU.  */
-	c->options = MIPS_CPU_4KEX | MIPS_CPU_COUNTER | MIPS_CPU_DIVEC |
-		     MIPS_CPU_LLSC | MIPS_CPU_MCHECK;
+	c->options = MIPS_CPU_4KEX | MIPS_CPU_4K_CACHE | MIPS_CPU_COUNTER |
+	             MIPS_CPU_DIVEC | MIPS_CPU_LLSC | MIPS_CPU_MCHECK;
 
 	c->scache.flags = MIPS_CACHE_NOT_PRESENT;
 
@@ -603,6 +605,15 @@ static inline void cpu_probe_alchemy(struct cpuinfo_mips *c)
 static inline void cpu_probe_sibyte(struct cpuinfo_mips *c)
 {
 	decode_configs(c);
+
+	/*
+	 * For historical reasons the SB1 comes with it's own variant of
+	 * cache code which eventually will be folded into c-r4k.c.  Until
+	 * then we pretend it's got it's own cache architecture.
+	 */
+	c->options &= MIPS_CPU_4K_CACHE;
+	c->options |= MIPS_CPU_SB1_CACHE;
+
 	switch (c->processor_id & 0xff00) {
 	case PRID_IMP_SB1:
 		c->cputype = CPU_SB1;
diff --git a/arch/mips/mm/c-r3k.c b/arch/mips/mm/c-r3k.c
index 03492a5..27f4fa2 100644
--- a/arch/mips/mm/c-r3k.c
+++ b/arch/mips/mm/c-r3k.c
@@ -319,7 +319,7 @@ static void r3k_dma_cache_wback_inv(unsigned long start, unsigned long size)
 	r3k_flush_dcache_range(start, start + size);
 }
 
-void __init ld_mmu_r23000(void)
+void __init r3k_cache_init(void)
 {
 	extern void build_clear_page(void);
 	extern void build_copy_page(void);
diff --git a/arch/mips/mm/c-r4k.c b/arch/mips/mm/c-r4k.c
index aa87ae5..31f080b 100644
--- a/arch/mips/mm/c-r4k.c
+++ b/arch/mips/mm/c-r4k.c
@@ -1221,7 +1221,7 @@ static inline void coherency_setup(void)
 	}
 }
 
-void __init ld_mmu_r4xx0(void)
+void __init r4k_cache_init(void)
 {
 	extern void build_clear_page(void);
 	extern void build_copy_page(void);
diff --git a/arch/mips/mm/c-sb1.c b/arch/mips/mm/c-sb1.c
index d183dbc..70d1ab3 100644
--- a/arch/mips/mm/c-sb1.c
+++ b/arch/mips/mm/c-sb1.c
@@ -496,7 +496,7 @@ static __init void probe_cache_sizes(void)
  * memory management function pointers, as well as initialize
  * the caches and tlbs
  */
-void ld_mmu_sb1(void)
+void sb1_cache_init(void)
 {
 	extern char except_vec2_sb1;
 	extern char handle_vec2_sb1;
diff --git a/arch/mips/mm/c-tx39.c b/arch/mips/mm/c-tx39.c
index c3ba81d..0a97a94 100644
--- a/arch/mips/mm/c-tx39.c
+++ b/arch/mips/mm/c-tx39.c
@@ -410,7 +410,7 @@ static __init void tx39_probe_cache(void)
 	}
 }
 
-void __init ld_mmu_tx39(void)
+void __init tx39_cache_init(void)
 {
 	extern void build_clear_page(void);
 	extern void build_copy_page(void);
diff --git a/arch/mips/mm/cache.c b/arch/mips/mm/cache.c
index 172293b..611b48d 100644
--- a/arch/mips/mm/cache.c
+++ b/arch/mips/mm/cache.c
@@ -104,58 +104,48 @@ void __update_cache(struct vm_area_struct *vma, unsigned long address,
 	}
 }
 
-extern void ld_mmu_r23000(void);
-extern void ld_mmu_r4xx0(void);
-extern void ld_mmu_tx39(void);
-extern void ld_mmu_r6000(void);
-extern void ld_mmu_tfp(void);
-extern void ld_mmu_andes(void);
-extern void ld_mmu_sb1(void);
+#define __weak __attribute__((weak))
+
+static char cache_panic[] __initdata = "Yeee, unsupported cache architecture.";
 
 void __init cpu_cache_init(void)
 {
-	if (cpu_has_4ktlb) {
-#if defined(CONFIG_CPU_R4X00)  || defined(CONFIG_CPU_VR41XX) || \
-    defined(CONFIG_CPU_R4300)  || defined(CONFIG_CPU_R5000)  || \
-    defined(CONFIG_CPU_NEVADA) || defined(CONFIG_CPU_R5432)  || \
-    defined(CONFIG_CPU_R5500)  || defined(CONFIG_CPU_MIPS32_R1) || \
-    defined(CONFIG_CPU_MIPS64_R1) || defined(CONFIG_CPU_TX49XX) || \
-    defined(CONFIG_CPU_RM7000) || defined(CONFIG_CPU_RM9000)
-		ld_mmu_r4xx0();
-#endif
-	} else switch (current_cpu_data.cputype) {
-#ifdef CONFIG_CPU_R3000
-	case CPU_R2000:
-	case CPU_R3000:
-	case CPU_R3000A:
-	case CPU_R3081E:
-		ld_mmu_r23000();
-		break;
-#endif
-#ifdef CONFIG_CPU_TX39XX
-	case CPU_TX3912:
-	case CPU_TX3922:
-	case CPU_TX3927:
-		ld_mmu_tx39();
-		break;
-#endif
-#ifdef CONFIG_CPU_R10000
-	case CPU_R10000:
-	case CPU_R12000:
-		ld_mmu_r4xx0();
-		break;
-#endif
-#ifdef CONFIG_CPU_SB1
-	case CPU_SB1:
-		ld_mmu_sb1();
-		break;
-#endif
-
-	case CPU_R8000:
-		panic("R8000 is unsupported");
-		break;
-
-	default:
-		panic("Yeee, unsupported cache architecture.");
+	if (cpu_has_3k_cache) {
+		extern void __weak r3k_cache_init(void);
+
+		r3k_cache_init();
+		return;
+	}
+	if (cpu_has_6k_cache) {
+		extern void __weak r6k_cache_init(void);
+
+		r6k_cache_init();
+		return;
 	}
+	if (cpu_has_4k_cache) {
+		extern void __weak r4k_cache_init(void);
+
+		r4k_cache_init();
+		return;
+	}
+	if (cpu_has_8k_cache) {
+		extern void __weak r8k_cache_init(void);
+
+		r8k_cache_init();
+		return;
+	}
+	if (cpu_has_tx39_cache) {
+		extern void __weak tx39_cache_init(void);
+
+		tx39_cache_init();
+		return;
+	}
+	if (cpu_has_sb1_cache) {
+		extern void __weak sb1_cache_init(void);
+
+		sb1_cache_init();
+		return;
+	}
+
+	panic(cache_panic);
 }